| 摘要 |
PURPOSE:To prevent the incidence of undesired light from a clearance formed when divided lens barrels are assembled together and to eliminate adverse influence upon an optical image by forming a projection edge part on one of mutually opposite abutting surfaces of the divided lens barrels and forming a recessed edge part on the other, and coupling the lens barrels so that the projection edge part and recessed edge part engage with each other. CONSTITUTION:The projection edge part 11 provided on one of the abutting surfaces of the divided lens barrels 1 and 1' and the recessed edge part 12 provided on the other are engaged with each other to prevent light from entering the lens barrels from the abutting surface flank. Further, the inner peripheral length of fitting parts of the divided lens barrels 1 and 1' for lenses 2, 3, and 4 is set a little bit shorter than a half the outer peripheral length of the lenses 2, 3, and 4 to fix the lenses securely. |
